東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

The separation and substrate indepen...

Chattopadhyay, Debjit D.

Linked to FindBook

Google Book

Amazon

博客來

The separation and substrate independent organization of single-wall carbon nanotubes.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	The separation and substrate independent organization of single-wall carbon nanotubes./
Author:	Chattopadhyay, Debjit D.
Description:	140 p.
Notes:	Adviser: Fotios Papadimitrakopoulos.
Contained By:	Dissertation Abstracts International64-02B.
Subject:	Chemistry, Polymer. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3080910

The separation and substrate independent organization of single-wall carbon nanotubes.
Chattopadhyay, Debjit D.

The separation and substrate independent organization of single-wall carbon nanotubes. - 140 p.

Adviser: Fotios Papadimitrakopoulos.

Thesis (Ph.D.)--The University of Connecticut, 2003.

Learning how to separate, purify and manipulate single wall carbon nanotubes (SWNTs) presents a unique challenge in material science. The processing-related difficulties of these long nano-fibers stem from their high aspect ratio, rigidity and the profound hydrophobic attractions along their tubular walls. Shortening them into discrete segments, with lengths from tens to hundreds of nanometers, presents a viable methodology to alleviate the shape-induced intractability. The thesis presents a route for the length fractionation of shortened-S WNTs, and most importantly provides a venue by which substantial separation of single wall carbon nanotubes (SWNTs) according to type (metallic versus semiconducting) has been achieved for HiPco and laser-ablated SWNTs. Herein I argue that stable dispersions of SWNTs with octadecylamine (ODA) in tetrahydrofuran (THF) originate from the physisorption and organization of ODA along the SWNT sidewalls in addition to the originally proposed zwitterion model. Furthermore, the reported affinity of amine groups for semiconducting SWNTs, as opposed to their metallic counterparts contributes additional stability to the physisorbed ODA. This provides a venue for the selective precipitation of metallic SWNTs upon increasing dispersion concentration, as indicated by Raman investigations. In addition, the thesis provides a novel metal-assisted self-organization of these nanosized objects into nano-forest geometries with dense perpendicular surface grafting, and demonstrates that such nanosized objects hold significant promise for the development of nanoscale sensors. Additionally, this dissertation provides a method for the complete elimination of catalytic impurities from SWNTs. Electrochemical actuators using such purified SWNTs have been characterized.Subjects--Topical Terms:

1018428
Chemistry, Polymer.

The separation and substrate independent organization of single-wall carbon nanotubes.
LDR:02698nam 2200265 a 45 001 934694
005 20110509
008 110509s2003 eng d
035 $a (UnM)AAI3080910
035 $a AAI3080910
040 $a UnM $c UnM
100 1 $a Chattopadhyay, Debjit D. $3 1258393
245 1 0 $a The separation and substrate independent organization of single-wall carbon nanotubes.
300 $a 140 p.
500 $a Adviser: Fotios Papadimitrakopoulos.
500 $a Source: Dissertation Abstracts International, Volume: 64-02, Section: B, page: 0739.
502 $a Thesis (Ph.D.)--The University of Connecticut, 2003.
520 $a Learning how to separate, purify and manipulate single wall carbon nanotubes (SWNTs) presents a unique challenge in material science. The processing-related difficulties of these long nano-fibers stem from their high aspect ratio, rigidity and the profound hydrophobic attractions along their tubular walls. Shortening them into discrete segments, with lengths from tens to hundreds of nanometers, presents a viable methodology to alleviate the shape-induced intractability. The thesis presents a route for the length fractionation of shortened-S WNTs, and most importantly provides a venue by which substantial separation of single wall carbon nanotubes (SWNTs) according to type (metallic versus semiconducting) has been achieved for HiPco and laser-ablated SWNTs. Herein I argue that stable dispersions of SWNTs with octadecylamine (ODA) in tetrahydrofuran (THF) originate from the physisorption and organization of ODA along the SWNT sidewalls in addition to the originally proposed zwitterion model. Furthermore, the reported affinity of amine groups for semiconducting SWNTs, as opposed to their metallic counterparts contributes additional stability to the physisorbed ODA. This provides a venue for the selective precipitation of metallic SWNTs upon increasing dispersion concentration, as indicated by Raman investigations. In addition, the thesis provides a novel metal-assisted self-organization of these nanosized objects into nano-forest geometries with dense perpendicular surface grafting, and demonstrates that such nanosized objects hold significant promise for the development of nanoscale sensors. Additionally, this dissertation provides a method for the complete elimination of catalytic impurities from SWNTs. Electrochemical actuators using such purified SWNTs have been characterized.
590 $a School code: 0056.
650 4 $a Chemistry, Polymer. $3 1018428
650 4 $a Engineering, Materials Science. $3 1017759
690 $a 0495
690 $a 0794
710 2 0 $a The University of Connecticut. $3 1249323
773 0 $t Dissertation Abstracts International $g 64-02B.
790 $a 0056
790 1 0 $a Papadimitrakopoulos, Fotios, $e advisor
791 $a Ph.D.
792 $a 2003
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3080910